Stockholders' Equity (Narrative) (Details) (USD $)	0 Months Ended	9 Months Ended
	Sep. 21, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Class of Stock [Line Items]
Par value per share		$ 10.00		$ 10.00
Liquidation preference per share		$ 1,000		$ 1,000
Shares of common stock		186,311
Par value per share		$ 1.00		$ 1.00
Exercise price per share		$ 9.46
Aggregate purchase price		$ 11,750,000
Securities purchase agreement, share repurchase amount		11,879,000
Securities purchase agreement, share repurchase paid in principal amount		11,750,000
Securities purchase agreement, share repurchase accured unpaid dividends amount		128,900
Preferred stock dividend rate		3.874%
Expected dividend rate at a fixed rate for a specificed period		9.00%
Number of stock repurchase from treasury		186,311
Payments for Repurchase of Warrants	458,000		458,000
Cumulative Preferred Stock [Member]
Class of Stock [Line Items]
Shares of perpetual preferred stock		11,750
Par value per share		$ 10.00
Liquidation preference per share		$ 1,000
Noncumulative Preferred Stock [Member]
Class of Stock [Line Items]
Shares of perpetual preferred stock		13,000
Liquidation preference per share		$ 1,000
Aggregate purchase price		$ 13,000,000
Minimum [Member]
Class of Stock [Line Items]
Expected dividend rate for the second through tenth dividend periods		1.00%
Expected dividend rate at a fixed rate for a specificed period		1.00%
Maximum [Member]
Class of Stock [Line Items]
Expected dividend rate for the second through tenth dividend periods		5.00%
Expected dividend rate at a fixed rate for a specificed period		7.00%